PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791674480',
];

$_COOKIE = [
    'PHPSESSID' => 'u8201aib9a179dnkb70dt8lf77',
    'topics-session' => '1791712828.182.16697.688285|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'c118274f6aa9ef62b70e16c95bd003fca1d2de935526a76748bb6fa07d6a8b2ba:2:{i:0;s:5:"_csrf";i:1;s:32:"N21tKGi-fBnz_74F4YkMx87XJQfyoE-E";}',
];

$_SESSION = [
    '__flash' => [],
];